The Whitfield Advantage II‑T pellet stove controller is a sealed electronic module that manages ignition, fan drive, and safety interlocks for the freestanding pellet stove. Common failures on this class of controllers include burned or tripped relay contacts in the ignition circuit, failure of the 12 V/24 V power supply board (often due to capacitor degradation), and loss of communication with the pellet feed motor driver caused by a faulty microcontroller or damaged solder joints. Initial troubleshooting should verify that the stove’s main power supply is delivering the correct voltage to the controller, inspect all visible connectors for corrosion or loose pins, and review any error codes displayed on the stove’s diagnostic panel (e.g., “E01” for ignition failure).[oss-gpt-20b]